Analyze Thermistor?
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@engikeneer said in Analyze Thermistor?:
@fcwilt for a quick & dirty check, you could always stick the bed in your oven, set the temperature to ~80deg and leave the wires dangling out the door. Even better if you have a reliable thermistor/thermocouple setup to put in to get an accurate reading of how hot the oven is. Repeat for a few temps and see how different the generated parameters are?
I do have an good meter for measuring temps.
Frederick
Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6
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Is the text config file a new thing in Marlin? It still only seems to set the hot end temp sensor, but it is Thermistor #1, so you should be able to look that up in Marlin. Really they should be posting their full Marlin source, where I guess the bed sensor is hard coded.
Ian
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@droftarts said in Analyze Thermistor?:
Really they should be posting their full Marlin source, where I guess the bed sensor is hard coded.
I will see what I can find but the web sites are sometimes a bit confusing.
Frederick
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@fcwilt can you use the Robin Nano electronics with the STM32 port of RRF? I don’t see it in @gloomyandy ’s wiki. https://teamgloomy.github.io/getting_started.html
Ian
Cartesian bed-slinger with Duet 3 Mini 5+ WiFi and 1LC : RRP Fisher Delta v1 with Duet 2 Maestro : TronXY X5S with Duet 3 MB6HC and Roto toolboard
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Looks like the Robin Nano uses STM32F103VET6, so I guess not.
Ian
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@droftarts said in Analyze Thermistor?:
Robin Nano
Short answer is no, not supported.
Longer answer is that there are different versions 1.x/2.x uses the STM32F1 mcu which we don't support. 3.x has an STM32F4 which we do support. However it uses a different SPI unit for SD card access to all of the other currently supported boards (plus a bunch of other differences). Given that we normally read the SD card to get a config file that describes the hardware this means it won't currently work. There are changes in the (currently unreleased) V3.3 version of the port that may make it possible to support the V3 board, but it is not something we have tested so far.
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@droftarts said in Analyze Thermistor?:
@fcwilt can you use the Robin Nano electronics with the STM32 port of RRF? I don’t see it in @gloomyandy ’s wiki. https://teamgloomy.github.io/getting_started.html
Ian
I have no idea where you are going with that.
What are you thinking I could use it for?
Frederick
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@fcwilt it appears as though the printer is powered by an MKS Robin Nano board.
There is a port of Reprapfirmware that supports STM32 processors and droftarts thought it might be compatible with it.
Unfortunately its not as it uses an STM32F1 processor rather than an F4 -
@jay_s_uk said in Analyze Thermistor?:
@fcwilt it appears as though the printer is powered by an MKS Robin Nano board.
There is a port of Reprapfirmware that supports STM32 processors and droftarts thought it might be compatible with it.
Unfortunately its not as it uses an STM32F1 processor rather than an F4Sorry - I failed to mention something that is very relevant. My bad.
The printer came with some kind of board but I am strictly a Duet user - their board went into the trash and I am using a Duet 3 Mini 5.
Frederick
Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6
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@fcwilt
the software would've functioned no different to a duet board, but fair enough -
@fcwilt said in Analyze Thermistor?:
their board went into the trash and I am using a Duet 3 Mini 5.
Great! Though the Robin Nano is probably worth €30, as it’s Marlin and probably Klipper compatible. Usually has TMC2208 or 2209 (same as Mini 5+) drivers on plug in boards. Or donate it to Andy or Jay to see if they can port RRF to it!
Ian
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I'll remember that next time and see if anyone wants the electronics.
I've got two unopened printer kits that include some kind of board.
Frederick
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This is the method I used , probably could be refined a bit but for me it was close enough
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@fcwilt said in Analyze Thermistor?:
@engikeneer said in Analyze Thermistor?:
@fcwilt for a quick & dirty check, you could always stick the bed in your oven, set the temperature to ~80deg and leave the wires dangling out the door. Even better if you have a reliable thermistor/thermocouple setup to put in to get an accurate reading of how hot the oven is. Repeat for a few temps and see how different the generated parameters are?
I do have an good meter for measuring temps.
Frederick
Bed temperature thermistor setting is not critical. Often the bed surface temperature is somewhat lower than the thermistor temperature anyway, especially if the bed is a glass, PEI, PrintBite or similar sheet; in which case you will find what bed temperature setting you need. For example, I use 70C when printing PLA. So for the bed thermistor, I suggest you assume a Chinese 100K thermistor with B3950.
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
I was in a similar position. I did as suggested above and made an assumption. I was able to use an infrared thermometer to measure the bed temps compared to what the Duet was aiming for and they're within a couple of c so I'm okay with that.
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@dc42 said in Analyze Thermistor?:
Bed temperature thermistor setting is not critical. Often the bed surface temperature is somewhat lower than the thermistor temperature anyway, especially if the bes is a glass, PEI, PrintBite or similar sheet; in which case you will find what bed temperature setting you need. For example, I use 70C when printing PLA. So for the bed thermistor, I suggest you assume a Chinese 100K thermistor with B3950.
Thanks much. I will give that a try.
